Modifications within Model 2a

Outlined here are some major modifications of the Model 2a SSC code.

csp_solver Changes

Major changes to csp_solver include:

• creating a new csp_dual_solver that is a child of csp_solver

• In the original, the constructor takes in a single collector_receiver object (in Model 1a, we use a child class called nuclear_plant)

  • Here, we have a new constructor that takes it a collector_receiver AND a nuclear_plant object

• A “nuclear” version of a lot of CSP input parameters are created

• Added calls specifically to nuclear_plant estimation methods before operating mode selection

  • Some if-else statements have been added to check if targets from Pyomo are reasonable

  • Now accounting for mixing of LFR and CSP outlet streams to hot tank

• Overloading the find_operating_modes method

  • have to add option to select new operating modes

  • account for dual heat and mass flow from both CSP and LFR

  • here is a gigantic diagram of the current state of operating mode selection:

  

• Logging outputs modified to account for added LFR stream

New Operating Modes

Below is a diagram of all new operating modes (dotted border) categorized by the corresponding CSP, PC, and TES modes that already exist.

csp_solver_mono_eq_methods Changes

Major changes to csp_solver_mono_eq_methods include:

• creating a new csp_dual_solver_mono_eq_methods that is a child of csp_solver_mono_eq_methods

• Mass flow solver now accounts for flow mixing between LFR and CSP output before entering hot tank